参数资料
型号: FVXO-HC72BR-70
厂商: Fox Electronics
文件页数: 14/15页
文件大小: 0K
描述: OSC 70 MHZ 2.5V HCMOS SMD
标准包装: 1
系列: FVXO-HC72, XPRESSO
类型: VCXO
频率: 70MHz
功能: 三态(输出启用)
输出: HCMOS
电源电压: 2.5V
频率稳定性: ±50ppm
工作温度: -40°C ~ 85°C
电流 - 电源(最大): 29mA
安装类型: 表面贴装
尺寸/尺寸: 0.295" L x 0.205" W(7.50mm x 5.20mm)
高度: 0.055"(1.40mm)
封装/外壳: 6-SMD,无引线(DFN,LCC)
包装: 剪切带 (CT)
FVXO-HC72 Series
MTTF / FITS Calculations
Products are grouped together by process for MTTF calculations.
(All XpressO output and package types are manufactured with the same process)
Number of Parts Tested:
Number of Failures: 0
360 (120 of each output type: HCMOS, LVDS, LVPECL)
Test Temperature:
Number of Hours:
125°C
2000
MTTF was calculated using the following formulas:
[1.] Device Hours ( devhrs ) = (number of devices) x (hours at elevated temperature in °K)
[2.] MTTF =
devhrs × af × 2
χ 2
[3.] FITS =
Where:
Label
1
MTTF
Name
* 10 9
Formula/Value
e
) × ( ? )
af
Acceleration Factor
(
eV
k
1 1
t 1 t 2
eV
k
t 1
t 2
Θ
r
χ 2
Activation Energy
Bolzman’s Constant
Theta
Failures
Chi-Square
0.40 V
8.62 X 10 -5 eV /°K
Operating Temperature (°K)
Accelerated Temperature (°K)
Confidence Level (60% industry standard)
Number of failed devices
statistical significance for bivariate tabular analysis [table look-
up] based on assumed Θ (Theta – confidence) and number of
failures (r) For zero failures (60% Confidence): χ 2 = 1.830
DEVICE-HOURS = 360 x 2000 HOURS = 720,000
e
?
ACCELERATION FACTOR =
(
0 . 40
8 . 625
) × (
1 1
298 398
)
= 49.91009
MTTF = 720, 000 × 49 .91009 × 2 = 39,209,238 Hours
1 . 833
Failure Rate =
1 . 833
720 , 000 × 49 . 91009 × 2
= 2.55E-8
FITS = Failure Rate *1E9 = 26
Page 14 of 15
? 2008 FOX ELECTRONICS | ISO9001:2000 Certified
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